Public bug reported: [Impact] The system hangs on blackscreen with thunderbolt monitor while resume from suspend state.
[Fix] The TBT monitor HPD will be triggered during the resume procedure and call the drm_client_modeset_probe() while struct drm_connector connector->dev->master is NULL. It will mess up the pipe topology after resume. AMD submitted a patch to fix this issue. https://lore.kernel.org/all/20240927170103.102180-3-jerry....@amd.com/T/#e868f6b967ec79ae85c5a8a446be9b5d5c97e5427 [Test case] 1. Boot to OS 2. Plug thunderbolt monitor to the system. 3. Enter suspend 4. Press the power button to resume from suspend 5. Should not hang [Where problems could occur] Pretty low chance to introduce any regressions. The patch won't do anything bad to the system while resuming, the probing will be done after resumed. ** Affects: hwe-next Importance: Undecided Status: New ** Affects: linux (Ubuntu) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.11 (Ubuntu) Importance: Undecided Status: Invalid ** Affects: linux (Ubuntu Noble) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.11 (Ubuntu Noble) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux (Ubuntu Oracular) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-6.11 (Ubuntu Oracular) Importance: Undecided Status: Invalid ** Tags: oem-priority originate-from-2064209 stella ** Also affects: linux (Ubuntu Noble) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Oracular) Importance: Undecided Status: New ** Also affects: linux-oem-6.11 (Ubuntu) Importance: Undecided Status: New ** Changed in: linux-oem-6.11 (Ubuntu Oracular) Status: New => Invalid ** Changed in: linux (Ubuntu Noble) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux (Ubuntu Oracular) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux-oem-6.11 (Ubuntu Noble) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux (Ubuntu Noble) Status: New => In Progress ** Changed in: linux (Ubuntu Oracular) Status: New => In Progress ** Changed in: linux-oem-6.11 (Ubuntu Noble) Status: New => In Progress ** Tags added: oem-priority originate-from-2064209 stella -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2083182 Title: The system hangs after resume with thunderbolt monitor(AMD GPU [1002:1900]) Status in HWE Next: New Status in linux package in Ubuntu: In Progress Status in linux-oem-6.11 package in Ubuntu: Invalid Status in linux source package in Noble: In Progress Status in linux-oem-6.11 source package in Noble: In Progress Status in linux source package in Oracular: In Progress Status in linux-oem-6.11 source package in Oracular: Invalid Bug description: [Impact] The system hangs on blackscreen with thunderbolt monitor while resume from suspend state. [Fix] The TBT monitor HPD will be triggered during the resume procedure and call the drm_client_modeset_probe() while struct drm_connector connector->dev->master is NULL. It will mess up the pipe topology after resume. AMD submitted a patch to fix this issue. https://lore.kernel.org/all/20240927170103.102180-3-jerry....@amd.com/T/#e868f6b967ec79ae85c5a8a446be9b5d5c97e5427 [Test case] 1. Boot to OS 2. Plug thunderbolt monitor to the system. 3. Enter suspend 4. Press the power button to resume from suspend 5. Should not hang [Where problems could occur] Pretty low chance to introduce any regressions. The patch won't do anything bad to the system while resuming, the probing will be done after resumed. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/2083182/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
